Shuttle-motion for looms



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TUCKER.

SHUTTLE MOTION FOR LOOMS. No. 397,823. Patented Feb. 12, 1889.

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W. TUCKER.

SHUTTLE MOTION FOR LOOMS.

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\YILLIAM TUCKER, OF EAST BROOKFIELD, MASSACHUSETTS.

SHUTTLE-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 397,823, dated February 12, 1889.

Application filed August 1, 1888- Serial No. 281,678. (No model.)

To aZZ 1071/0722 it may concern:

Be it known that I, WILLIAM TUCKER, a citizen of the United States, and a resident of East Brookfield, in the State of Massach usetts, have invented anew and useful Improvement in Shuttle-Motions for Looms, of which the following is a specification.

This invention relates to the pick-roll arms and plates or the carriers of pick-rolls in looms.

Formerly the pair of pick-arms most commonly employed at each end of a loom were made in one piece, having a hub by which it was keyed to the shaft; but owing to the numerous breakages from the heavy blows of the pick-rolls upon the pick-shoes and the long delays for repairs so occasioned such arms were and are 110w commonly made in three partsnamely, a plate or hub which is keyed to the shaft, and two pieces, forming the arms proper, which are divided at a line passing through the center of the shaft, so that a new piece or pieces may be readily bolted on in place of either or both when a break occurs.

My present invention consists in certain novel combinations of parts, as hereinafter set forth and claimed, whereby the pick-roll arms become practically free from liability to be accidentally broken, and at the same time the noise of the pick-motions is materially reduced, durability in other respects is insured, and a better clearance of the pick-rolls from the shoes is effected.

Two sheets of drawings accompany this specification as part thereof.

Figure l of the drawings represents a face view of an improved pick-motion deviceillustrating this invention. Fig. 2 represents a top view of the same as seen in Fig. 1. Fig. 3 represents a fragmentary end view, partly in section, of a loom provided with myimproved pick-motion devices; and Fig. 4 represents a front view of the pick-shoe seen in Fig.

Like letters of reference indicate correspondin g parts in the several figures.

The customary longitudinal rotary shaft, A, is provided near each end with a face-plate, B, made fast thereon by a key, 7:, Fig. 2, and a double-ended arm-piece, O, on the outer side of the face-plate, which arm-piece is preferably a single casting, having an eye at midlength, within which the shaft A forms a fulcrum and keeps the arms axially in position. The arm-piece O of each piclcmction is loose 'angularly on the shaft A, and is held longitudinally of the shaft against the face-plate B by shouldered tap-bolts or screws 6 b, which re Diag'onally-opposite bosses D D on the same face of the plate B project to a thickness about equal to that of the arm-piece, and are provided in their driving-surfaces opposed to the rear edges of the respective arms with drilled chambers c c, forming spring-abutments, and spiral springs S S, seated in these chambers and projecting therefrom, act against the respective arms to push them from the bosses as far as said screws 1) and slots at will allow.

The extremities of the arm-piece C are provided, as in other pick-motions, with suitablyshouldered roll-studs m m, fastened by screwnuts 12 n at effective points within slots 0 0, the latter being concentric with the shaft A, and the studs flattened where they pass through the slots, as shown in Fig. 1. The pick-rolls E E rotate freely on the protruding ends of the roll-studs m, being secured against escape by pins p, for example; and an ordinary pickshoe, F, Figs. 3 and 4:, to coact with each pair of rolls, is bolted fast in effective position on a rock-shaft, G, at right angles to said shaft A, in customary manner.

Motion may be transmitted from the rockshafts G to the shuttle or shuttles in customary manner, as illustrated by Fig. 3-that is to say, by a lever arm, H, fast on each rockshaft, through connections I to the pickerstaif J at its end of the loom, and from the latter through connections K to its picker L within the lay M, and shuttle box or boxes N. Fig. 3 represents a loom with several boxes at each end, each set being movable vertically by an ordinary box-motion, represented by its rod 0, to bring any box with its shuttle into line with the pickers at will. The piekenstaft .l is pivoted, as at 0:, Fig. I}, to the lay-frame;

and both pickers are retracted and both piekshoes re elevated through the respective pieker-statt's and connections by the customary pick-spring, l, near the floor, which is connected with both picker-stalls by a strap, Q, at each end thereof.

The loom is re n'esented in Fig. I in position for a shuttle to fly. The dotted circle 1 represents the path of the outermost or aet 1 ing surfaces of the pick-rolls, and the arrow the direct ion in which the revolve. At the contact of a roll, 15, with the shoe I there is a little lost motion, as the springs S yield more readily than the shoe and shuttle, with the added inertia of the intermetfliate parts aftnresaid and the resistance of the tucker-spring 1 The strain and noise are thus reduced, as I aforesaid, and the shuttle is started by persnasive it'orce, so to speak, instead of by a sudden blow. After the shuttle is started the springs S, tending;- to recover their normal length, accelerate the revolving mot-ion ot' the rolls, and at the last end of the drivj ing-stroke of each roll clear it from the shoe 1?, so as to permit the latter to rise and the picker to be retracted with the utmost rapidity. in this operation the advance motion of the recoilint, springs is snperadded to the constant advance motion of the shaft A. To secure these mlvantac'es in perpetuity, the elastic medium through which the force is transmitted must possess a considerable ran ge of elasticity. Spiral springs of tempered steel wire are found to have this large range of action when rightly constructed, and in each of my devices the elasticity of two such springs is utilized in eonnectitjm with the action of each pick-roll.

As looms are oftenconstructed now with as many as seven shuttle-boxes, N, at each end, 5 and shuttle after shuttle must be sent from the same end of a loom running at one hundred revolutions per minute, or thereabout, it becomes a matter of great importance to at tendto the question of time. \Yith so many boxes, each of which must come to the proper level on time within a fraction of a second, with the vertical movement possible from one extreme to the other, as represented by (lotted lines in Fig. 53, the clearance of the pickrolls becomes of vital importance, as the shoe cannot rise faster than the movement: of the escaping-roll, the picker cannot be fully retracted until the shoe rises, and the boxes cannotbe shifted until the retraction of the pickeris completed. My improved pick-motions provide, as aforesaid, for expediting the completion of all these moytmients, and this without complication of parts and with red need liability to breakage and reduced noise.

I have described a pair of pick-rolls for each end of the loom beez'tuse this arrangen'u ut is now usually en'iployed. \\'ith a single roll at each end of the loom one of the springs H, with one of the bosses i), could be omitted at each end, but the duplex arrangement; would preferably still be used, omitting only thoextremity of the second arm l'ieyond the perimeter of the faceplate at. each end of the loom.

llaviug thus described my said in'iprovement in piclmnotions, I claim as my invention and desire to patent under this S1)G(5il'l(itli0li-- l. The cmnbination, with the rotary shaft,

' roekshaft, and shoe, ot a faceplate fast on said rotary shaft and provided with springabnt'ments, an arm-piece carrying a pick-roll. or )iek-rolls and movable angnlarly on said shaft, and an interposed spring or springs aeting in the direction of the revolution of said roll or rolls at each end of the loom, si'lbstantially as hereinbefore QJKBClfiUtl.

The combination, with the rotary shaft A, the rock-shaft G, a. shoe, 1, and a pick-roll or pick-rolls, E, of a faceplate fast on said shaft and having diagonally-opposite bosses provided with chamlmrs in their driving-surfaces to form s'pring-abntments, a pair of spiral springs in said ehaml'iers, an arm-pieee provided with roll-studs for said rolls and movable angularly upon said shaft as a fulerum, means for adjusting said roll-studs, and means for preventing the longitudinal. displacement; of said arm-piece and for limiting its {tl'lglJlZtll movement, substantially as hereinbefore specified.

3. In combination with a picker, a pickshoe, means for re-elevating said shoe, its reek-shaft, and suitable connections, as those ordinarily emploved at each end of the loom, the rotary shaft A, having ateaeh end a faceplate, Ill, fast thereon and n'ovided with spring-aluitments, an arm-piece, movable angnlarly on said shaft and provided with roll-studs which carry the pick-rolls, and springs S, interposed between said abntments and the pick-arms and actingin the direction of the revolution of the pick-rolls, substantially as hereinbefore specified, whereby the clearance of the shoe by each pick-roll after each drivi n g stroke may l ie more exped itionsl y effected, as set forth.

Witnesses:

(Animus l". toiuucs, A'R'IITITR J. Kine.

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